Matisse: 分享一个将拍照和选取相册中的图片uri转化为path的工具类。

Created on 25 Oct 2017 · 3Comments · Source: zhihu/Matisse

package com.pcb.mall.utils;

import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.provider.DocumentsContract;
import android.provider.MediaStore;

/**

Created by liuwei on 2017/10/25.
图片工具类
*/

public class PictureUtils {

/**
 * 从图片uri获取path
 *
 * @param context 上下文
 * @param uri     图片uri
 */
public static String getPathFromUri(Context context, Uri uri) {
    String outPath = "";
    Cursor cursor = context.getContentResolver()
            .query(uri, null, null, null, null);
    if (cursor == null) {
        // miui 2.3 有可能为null
        return uri.getPath();
    } else {
        if (uri.toString().contains("content://com.android.providers.media.documents/document/image")) { // htc 某些手机
            // 获取图片地址
            String _id = null;
            String uridecode = uri.decode(uri.toString());
            int id_index = uridecode.lastIndexOf(":");
            _id = uridecode.substring(id_index + 1);
            Cursor mcursor = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, null, " _id = " + _id,
                    null, null);
            mcursor.moveToFirst();
            int column_index = mcursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            outPath = mcursor.getString(column_index);
            if (!mcursor.isClosed()) {
                mcursor.close();
            }
            if (!cursor.isClosed()) {
                cursor.close();
            }
            return outPath;
        } else {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                if (DocumentsContract.isDocumentUri(context, uri)) {
                    String docId = DocumentsContract.getDocumentId(uri);
                    if ("com.android.providers.media.documents".equals(uri.getAuthority())) {
                        //Log.d(TAG, uri.toString());
                        String id = docId.split(":")[1];
                        String selection = MediaStore.Images.Media._ID + "=" + id;
                        outPath = getImagePath(context, MediaStore.Images.Media.EXTERNAL_CONTENT_URI, selection);
                    } else if ("com.android.providers.downloads.documents".equals(uri.getAuthority())) {
                        //Log.d(TAG, uri.toString());
                        Uri contentUri = ContentUris.withAppendedId(
                                Uri.parse("content://downloads/public_downloads"),
                                Long.valueOf(docId));
                        outPath = getImagePath(context, contentUri, null);
                    }
                    return outPath;
                }
            }
            if ("content".equalsIgnoreCase(uri.getScheme())) {
                String auth = uri.getAuthority();
                if (auth.equals("media")) {
                    outPath = getImagePath(context, uri, null);
                } else if (auth.equals("com.pcb.mall.fileprovider")) {
                    //参看file_paths_public配置
                    outPath = Environment.getExternalStorageDirectory() + "/Pictures/" + uri.getLastPathSegment();
                }
                return outPath;
            }
        }
        return outPath;
    }

}


/**
 * 从uri中取查询path路径
 *
 * @param context   上下文
 * @param uri
 * @param selection
 */
private static String getImagePath(Context context, Uri uri, String selection) {
    String path = null;
    Cursor cursor = context.getContentResolver().query(uri, null, selection, null, null);
    if (cursor != null) {
        if (cursor.moveToFirst()) {
            path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
        }
        cursor.close();
    }
    return path;
}

}

Source